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ZIP Code 20684
St. George Island, MD, St. Mary's County
Population
802
Land area
8.3sq mi
People per sq mi
96
City
St. George Island
ZIP 20684 and nearby ZIP codes
ZIP 20684 at a glance
- ZIP 20684 (St. George Island) is 85% less dense than Maryland as a whole.
- The median household income is $180,060, 74% above the Maryland median of $103,678.
- A typical owner-occupied home is valued at $360,500 (14% below Maryland).
Local data for ZIP 20684
Counts from official public data
Housing and community stats
ZIP 20684, American Community Survey 2020-2024
Median household income
$180,060
Poverty rate
1.1%
Median home value
$360,500
Homeownership
93.0%
Bachelor's or higher
49.7%
Median age
44.2
Average commute
22.2 min
Economy and federal money
Businesses, pandemic loans and political donations
Business establishments
20
ZIP Business Patterns 2023
Employees
551
$44M annual payroll
PPP loans
$223K
14 loans
Campaign donations
$5,106
0% D, 32% R, 2026 cycle
Environment and hazard risk
ZIP 20684, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: hurricane
Storm events since 1996
1,019
Countywide, mostly thunderstorm wind
Flood insurance policies
990
2.4% of homes, county
July high / Jan low
87° / 30°F
46.3 inches of rain a year
Health statistics
Share of adults in ZIP 20684, CDC PLACES estimates
Obesity
38.6%
U.S. 33.3% +5.3 pts
Diabetes
13.5%
U.S. 12.1% +1.4 pts
Smoking
13.6%
U.S. 12.8% +0.8 pts
Uninsured (18-64)
6.7%
U.S. 11.1% -4.4 pts
Frequently asked questions
- What city is ZIP code 20684?
- ZIP code 20684 is in St. George Island, MD (St. Mary's County).
- What county is ZIP code 20684 in?
- ZIP code 20684 is mostly in St. Mary's County, Maryland.
- How many people live in ZIP code 20684?
- About 802 people live in the 20684 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.
Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.